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Vascular Architecture Characters and Changes of Pediatric Moyamoya Disease after Combined Bypass Surgery

Yan Ma1, Xia Lu1, Gao Zeng1

  • 1Department of Neurosurgery, Capital Medical University, Xuanwu Hospital, Beijing, China.

Neuropediatrics
|January 28, 2022
PubMed

Insights

Combined bypass surgery (CBS) in pediatric moyamoya disease (MMD) effectively reduces certain collateral pathways but can worsen main trunk stenosis. Close monitoring and timely contralateral surgery are recommended for pediatric MMD patients post-CBS.

Area of Science:

  • Neurology
  • Neurosurgery
  • Pediatric Medicine

Background:

  • Moyamoya disease (MMD) is a rare cerebrovascular disorder characterized by progressive stenosis of the internal carotid arteries and development of fragile collateral vessels.
  • Pediatric MMD presents unique challenges due to the developing vascular system and potential for ischemic or hemorrhagic events.

Purpose of the Study:

  • To analyze angioarchitecture changes following combined bypass surgery (CBS) in pediatric patients with Moyamoya disease (MMD).
  • To evaluate the short-term and long-term effects of unilateral CBS on cerebral vessel stenosis and collateral networks.

Main Methods:

  • Retrospective analysis of pediatric MMD patients (3-19 years) who underwent CBS.
  • Pre- and post-operative imaging (digital subtraction angiography, MRI) were used to assess main trunk stenosis and collateral systems.
  • Evaluation included superficial-meningeal, deep parenchymal, PCA-MCA, and PCA-ACA anastomoses.

Main Results:

  • Short-term follow-up showed significant progression of main trunk stenosis in both operative and non-operative hemispheres after unilateral CBS.
  • Long-term follow-up (median 28.5 months) revealed a significant decrease in posterior cerebral artery-middle cerebral artery (PCA-MCA) anastomoses.
  • The subependymal anastomotic network significantly decreased, while inner thalamic and striatal networks showed no significant change.

Conclusions:

  • Successful CBS can reduce specific collateral pathways, such as PCA-MCA leptomeningeal system and subependymal compensations.
  • Rapid aggravation of main trunk stenosis necessitates strict, regular follow-ups and consideration of contralateral surgical intervention.
  • Prompt contralateral surgical intervention may benefit pediatric MMD patients following initial unilateral CBS.
Abstract

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